For use with the mouse brain stereotaxic instrument. Different from the 30-2031 (hot-selling) adapter, the body position behind the nose, mouth and ear rods is equipped with an elevating water bath platform. After the nose, mouth and ear rods are fixed, the body can quickly Raise or lower to keep the head and body at the same level, keeping the mouse's breathing smooth and comfortable during brain experiments; at the same time, the platform can be connected to a constant-temperature water circulation pump to continuously keep the platform on which the mouse body is placed at a constant temperature, and has the ability to heat quickly , constant and uniform temperature, no electromagnetic interference and other advantages.